OpenAFS Master Repository branch, master, updated. openafs-devel-1_5_68-11-g34ffc9c

[Gerrit Code Review]

The following commit has been merged in the master branch:
commit 34ffc9cd7d7eed62229704ad0e1d327f076ea7b6
Author: Simon Wilkinson <sxw@inf.ed.ac.uk>
Date:   Fri Nov 20 15:08:25 2009 +0000

    Linux: Use splice to speed up cache storeback
    
    This patch adds a new cache store function for Linux, which uses
    splice() and direct access to the page cache, rather than doing
    data copies to a temporary buffer between rx and afs. It removes
    one copy, and some context switching, from the write codepath.
    
    One side-effect here is that it will delay storebehinds from
    returning control to the user. Instead of returning once the first
    4k has been successfully transfered, we will wait until a cache
    chunk has been transmitted. This is currently unavoidable, as we
    can't take the GLOCK within a splice actor.
    
    Change-Id: I5b0284d67febccf099710589908fad18b808332c
    Reviewed-on: http://gerrit.openafs.org/903
    Reviewed-by: Derrick Brashear <shadow@dementia.org>
    Tested-by: Derrick Brashear <shadow@dementia.org>

 acinclude.m4                      |    1 +
 src/afs/LINUX/osi_fetchstore.c    |  181 +++++++++++++++++++++++++++++++++++++
 src/afs/afs_fetchstore.c          |    3 +
 src/afs/afs_prototypes.h          |    5 +
 src/cf/linux-test4.m4             |   13 +++
 src/libafs/Makefile.common.in     |    2 +
 src/libafs/MakefileProto.LINUX.in |    3 +-
 7 files changed, 207 insertions(+), 1 deletions(-)

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